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Table 1 Expression of CRD genes under various levels of chromate stressa.

From: High-level chromate resistance in Arthrobactersp. strain FB24 requires previously uncharacterized accessory genes

CRD Gene Basal Expression
In 0 mM Cr(VI)b × 102 		Relative Fold Differencec
Cr(VI)/0 mM Cr(VI)
   0.005 0.025 0.05 0.1 5 20 100
chrL 4.20
(0.45) 		36.7*
(9.3) 		95.2
(8.7) 		69.8
(12.1) 		95.1
(42.9) 		63.4
(29.7) 		45.1*
(14.3) 		15.3*
(3.5)
chrA 6 2.25
(0.36) 		8.5*
(1.3) 		16.2*
(3.9) 		27.4*
(2.5) 		42.1
(4.2) 		50.7
(14.5) 		37.6
(9.8) 		22.9
(8.2)
chrB-Cterm2 15.6
(4.95) 		2.0*
(0.3) 		2.2*
(0.5) 		2.5*
(0.5) 		7.1
(2.6) 		6.3
(1.8) 		8.0
(3.2) 		2.0*
(0.8)
SCHR 8.50
(2.06) 		1.9*
(0.5) 		4.7*
(0.6) 		5.1*
(0.7) 		7.8
(0.7) 		6.8
(1.9) 		5.1
(1.2) 		2.1*
(0.9)
chrK 21.9
(2.89) 		3.7*
(0.5) 		6.1*
(0.7) 		7.5
(1.9) 		10.1
(1.9) 		7.2
(1.6) 		6.9
(1.6) 		4.4
(1.4)
chrB-Nterm 249
(86.4) 		8.0
(2.6) 		12.5
(4.0) 		13.8
(5.6) 		18.0
(8.0) 		16.9
(7.1) 		14.0
(6.5) 		4.2
(1.5)
chrB-Cterm 0.51
(0.04) 		4.3*
(0.7) 		8.4*
(2.1) 		16.0*
(1.5) 		21.3
(2.0) 		25.4
(4.4) 		30.9
(6.0) 		15.3
(5.5)
chrJ 1.23
(0.40) 		7.2*
(1.5) 		14.3*
(2.8) 		19.0*
(2.5) 		37.0
(15.0) 		92.4
(47.2) 		47.6
(13.2) 		19.2
(6.7)
  1. a The basal (0 mM Cr(VI)) transcript levels are given in copy number/ng total RNA. For the remaining concentrations of Cr(VI), the average fold difference relative to the 0 mM Cr(VI) basal state is given. Bold values indicate the concentration at which maximum expression was observed. *, significantly different than the maximum expression level.
  2. b Mean transcript copy number/ng total RNA. SE is given in parentheses (n = 6).
  3. c Mean Fold Difference calculated by dividing the average transcript copy number in each Cr(VI) condition by the average transcript copy number in 0 mM Cr(VI). SE is given in parentheses (n = 6).
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BMC Microbiology

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